YOU SAID:
The cat was let out of the bag.
INTO JAPANESE
猫が袋から出されました。
BACK INTO ENGLISH
The cat was taken out of the bag.
INTO JAPANESE
袋から猫が出てきました。
BACK INTO ENGLISH
A cat came out of the bag.
INTO JAPANESE
袋から猫が出てきました。
BACK INTO ENGLISH
A cat came out of the bag.
That didn't even make that much sense in English.